Electricity (C10)

Write Joule’s law of heating.

Answer

Joule’s law of heating

Heat produced in a resistor is

  1. directly proportional to the square of current for a given resistance,
  2. directly proportional to the resistance for a given current and
  3. directly proportional to the time for which the current flows through the resistor

H = I2Rt

where,

  • H = Heat produced
  • I = current
  • R = Resistance of the conductor
  • t = Time for which the current flows through the resistor